update public

public/content/exercises/homework01.html

public/content/exercises/homework01.ipynb

public/content/exercises/homework01.pdf

...xercises/homework01_files/figure-html/cell-2-output-1.png

...xercises/homework01_files/figure-html/cell-3-output-1.png

public/content/exercises/homework02.html

public/content/exercises/homework02.ipynb

public/content/exercises/homework02.pdf

...ercises/homework02_files/figure-html/cell-10-output-1.png

...ercises/homework02_files/figure-html/cell-14-output-1.png

...ercises/homework02_files/figure-html/cell-18-output-1.png

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...xercises/homework02_files/figure-html/cell-2-output-3.png

...xercises/homework02_files/figure-html/cell-2-output-4.png

...xercises/homework02_files/figure-html/cell-7-output-1.png

public/content/exercises/homework03.html

public/content/exercises/homework03.ipynb

public/content/exercises/homework03.pdf

public/content/exercises/homework04.html